77120 is a postalcode and its consensus geometry is derived from frgov.
{"mz:is_ceased":0,"geom:latitude":48.788461,"wof:name":"77120","counts:names_total":0,"wof:placetype":"postalcode","frgov:DEP":"77","frgov:ID":"77120","frgov:_COL6":10369.832,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633147,"county_id":102065469,"localadmin_id":404364525,"macrocounty_id":404227753,"macroregion_id":404227465,"postalcode_id":421307443,"region_id":85683385}],"mz:is_deprecated":0,"frgov:SURF":134.833505,"geom:area":0.016552,"geom:longitude":3.095506,"wof:id":421307443,"frgov:LIB":"Coulommiers","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1480938938,"wof:belongsto":[85683385,102191581,85633147,404364525,404227753,404227465,102065469],"wof:concordances":{"gp:id":"12727353"},"wof:repo":"whosonfirst-data-postalcode-fr","src:geom":"frgov","wof:country":"FR","counts:names_preferred":0,"frgov:POP2010":25068,"gp:parent_id":"12597137","geom:area_square_m":1.34842823488846E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"FR","counts:names_languages":0,"geom:bbox":"3.00442774738,48.7051197382,3.18836357865,48.8718879661","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"3a69f588e98649f61640848c81218ecd","wof:parent_id":404364525,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}